silverrat | ab51ee1b9d05629f8756c9d552a2e182f6273c34a9cb052e9ba5338667bc5a97

General

Target

SilverClient.exe
Size

42KB
MD5

c312ff9dfd199ae5b504932e018b4d84
SHA1

75ff47cc5fb04726d14df93b9c8804360a74f4ad
SHA256

ab51ee1b9d05629f8756c9d552a2e182f6273c34a9cb052e9ba5338667bc5a97
SHA512

94a1e811451022abc9e408c5ede051d9656ce74383455b3ecb897dba9c1abf1bac21447b42ece811845271639de201d780b9aaab594615636fc59538be3684a7
SSDEEP

768:VdLkzyZYjLyb63W3DtmMfBJ/MlKYMRUA9PsMtB6SnXyvruaNE:VdLkz8bRhh7a3MGA95oQXyiaNE

Score

10^/10

silverrat execution trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

Mutex

SilverMutex_EZMDaghRAK

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1344190210203975710/llWGKbVGP8KFjTLbojySgUGmRZ-7w1XiROSsUTWS4cwLV54tR8hpAm5WBow8QrkHvn-k
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
dmthUlBIaHJSb3BpbVJEa1JUQVJtbllUWUR2TWFZ
payload_url
https://g.top4top.io/p_2522c7w8u1.png
reconnect_delay
3443
server_signature
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

Signatures

SilverRat
SilverRat is trojan written in C#.
trojan silverrat
Silverrat family
silverrat

Executes dropped EXE 1 IoCs

pid	Process
2212	HP_Updates.exe

Loads dropped DLL 1 IoCs

pid	Process
2000	cmd.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2708	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
5	discord.com
4	discord.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1916	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2936	schtasks.exe
2796	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1904	SilverClient.exe
1904	SilverClient.exe
1904	SilverClient.exe
2708	powershell.exe
2212	HP_Updates.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1904	SilverClient.exe
Token: SeDebugPrivilege	2212	HP_Updates.exe
Token: SeDebugPrivilege	2708	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2212	HP_Updates.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1904 wrote to memory of 2000	1904	SilverClient.exe	30
PID 1904 wrote to memory of 2000	1904	SilverClient.exe	30
PID 1904 wrote to memory of 2000	1904	SilverClient.exe	30
PID 2000 wrote to memory of 1916	2000	cmd.exe	32
PID 2000 wrote to memory of 1916	2000	cmd.exe	32
PID 2000 wrote to memory of 1916	2000	cmd.exe	32
PID 2000 wrote to memory of 2212	2000	cmd.exe	34
PID 2000 wrote to memory of 2212	2000	cmd.exe	34
PID 2000 wrote to memory of 2212	2000	cmd.exe	34
PID 2212 wrote to memory of 2916	2212	HP_Updates.exe	35
PID 2212 wrote to memory of 2916	2212	HP_Updates.exe	35
PID 2212 wrote to memory of 2916	2212	HP_Updates.exe	35
PID 2212 wrote to memory of 2796	2212	HP_Updates.exe	37
PID 2212 wrote to memory of 2796	2212	HP_Updates.exe	37
PID 2212 wrote to memory of 2796	2212	HP_Updates.exe	37
PID 2212 wrote to memory of 2804	2212	HP_Updates.exe	39
PID 2212 wrote to memory of 2804	2212	HP_Updates.exe	39
PID 2212 wrote to memory of 2804	2212	HP_Updates.exe	39
PID 2212 wrote to memory of 2708	2212	HP_Updates.exe	41
PID 2212 wrote to memory of 2708	2212	HP_Updates.exe	41
PID 2212 wrote to memory of 2708	2212	HP_Updates.exe	41
PID 2212 wrote to memory of 2936	2212	HP_Updates.exe	43
PID 2212 wrote to memory of 2936	2212	HP_Updates.exe	43
PID 2212 wrote to memory of 2936	2212	HP_Updates.exe	43

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\SilverClient.exe
"C:\Users\Admin\AppData\Local\Temp\SilverClient.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1904
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC0B0.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2000
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1916
- - C:\Users\Admin\HP_Drivers\HP_Updates.exe
    "C:\Users\Admin\HP_Drivers\HP_Updates.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2212
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN HP_Updates.exe
      4⤵
      PID:2916
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "HP_Updates.exe" /TR "C:\Users\Admin\HP_Drivers\HP_Updates.exe \"\HP_Updates.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2796
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN HP_Updates.exe
      4⤵
      PID:2804
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2708
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc hourly /mo 1 /tn "HP_Updates_Task-HOURLY-01" /tr "%MyFile%" /st 00:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC0B0.tmp.bat

Filesize
149B

MD5
f123210cf2fb1938b3d9e35cddf1d646

SHA1
1711ece76b142dd2a7d0f2e14fe9fbe84baea05d

SHA256
837c506ae05b7bacd9070e87dad680e54abe86b45c3b0396cf1eb7981fd9abd1

SHA512
6437aa664aa57483a12bbaf88587480a56119d156f1968ceef57b429168fbb2fdb3f93ae73c62f512dbb9de58ba763c041dcf2047e4c09a97ee58c0253900fa2

Download Submit
\Users\Admin\HP_Drivers\HP_Updates.exe

Filesize
42KB

MD5
c312ff9dfd199ae5b504932e018b4d84

SHA1
75ff47cc5fb04726d14df93b9c8804360a74f4ad

SHA256
ab51ee1b9d05629f8756c9d552a2e182f6273c34a9cb052e9ba5338667bc5a97

SHA512
94a1e811451022abc9e408c5ede051d9656ce74383455b3ecb897dba9c1abf1bac21447b42ece811845271639de201d780b9aaab594615636fc59538be3684a7

Download Submit
memory/1904-0-0x000007FEF5B93000-0x000007FEF5B94000-memory.dmp

Filesize
4KB

Download
memory/1904-1-0x000000013F870000-0x000000013F880000-memory.dmp

Filesize
64KB

Download
memory/1904-10-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp

Filesize
9.9MB

Download
memory/1904-24-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp

Filesize
9.9MB

Download
memory/2212-16-0x000000013FDA0000-0x000000013FDB0000-memory.dmp

Filesize
64KB

Download
memory/2212-17-0x000007FEF51A0000-0x000007FEF5B8C000-memory.dmp

Filesize
9.9MB

Download
memory/2212-25-0x000007FEF51A3000-0x000007FEF51A4000-memory.dmp

Filesize
4KB

Download
memory/2212-26-0x000007FEF51A0000-0x000007FEF5B8C000-memory.dmp

Filesize
9.9MB

Download
memory/2708-22-0x000000001B580000-0x000000001B862000-memory.dmp

Filesize
2.9MB

Download
memory/2708-23-0x00000000027F0000-0x00000000027F8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads